<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"> </el-alert>
      <!-- 进度条区 -->
      <el-steps align-center :space="200" :active="activeIndex - 0" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab区 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs @tab-click="tabClicked" :before-leave="beforeTabLeave" v-model="activeIndex" :tab-position="'left'">
          <!-- 基本信息 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品参数 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :key="item.attr_id" :label="item.attr_name" v-for="item in manyTableData">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="ck" v-for="(ck, i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品属性 -->
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload :on-success="handleSuccess" :headers="headerObj" :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button @click="add" type="primary" class="btnAdd">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="60%">
      <img class="previewImg" :src="previewPath" alt="" />
    </el-dialog>
  </div>
</template>

<script>
// 导入lodash
import _ from 'lodash'
export default {
  data() {
    return {
      // 步骤条默认显示项
      activeIndex: '0',
      //   添加表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //   商品所属分类数组
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        attrs: [],
      },

      //   表单验证规则
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }],
      },
      //   商品分类列表
      catelist: [],
      //   级联选择器配置对象
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover',
      },
      //   动态参数列表数据
      manyTableData: [],
      //   静态属性列表数据
      onlyTableData: [],
      //   上传图片的url地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //   图片上传时的请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      //   预览图片路径
      previewPath: '',
      previewVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //   获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类数据失败')
      this.catelist = res.data
    },
    // 级联选择器选中变化触发
    handleChange() {
      //console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      //   console.log(this.manyTableData)
    },
    // 阻止标签页切换
    beforeTabLeave(actveName, oldActveName) {
      if (oldActveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked() {
      // 访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' },
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        //   访问的是静态属性面板
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' },
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败')
        }
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      //   console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片操作
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex((item) => {
        item.pic === filePath
      })
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功
    handleSuccess(response) {
      //   console.log(response)
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      //   console.log(this.addForm)
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写必填表单项')
        // 深拷贝 lodash包 cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // console.log(this.manyTableData)
        // 传入动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        // 传入静态参数
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 8px 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>